How is the proton gradient of H+ generated in chloroplasts during photosynthesis? A. Light splits water molecules in the stroma, causing the release of protons. B. Protons are pumped across the thylakoid membrane using energy from ATP. C. Light causes protons to flow through protein channels in the thylakoid membrane. D. The flow of electrons from carrier to carrier in the thylakoid membrane causes the pumping of protons.

How is the proton gradient of H+ generated in chloroplasts during photosynthesis? A. Light splits water molecules in the stroma, causing the release of protons. B. Protons are pumped across the thylakoid membrane using energy from ATP. C. Light causes protons to flow through protein channels in the thylakoid membrane. D. The flow of electrons from carrier to carrier in the thylakoid membrane causes the pumping of protons.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter5: Photosynthesis

Section: Chapter Questions

Problem 10RQ: Which statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound...

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Which statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound b. the use of RUBISCO to form 3-PGA c. the production of carbohydrate molecules from G3P d. the formation of RuBP from G3P molecules e. the use of ATP and NADPH to reduce CO2
What are the roles of ATP and NADPH in photosynthesis? a. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce sugars. b. ATP and NADPH are forms of chemical energy produced from the light independent reactions, to be used in the light dependent reactions that produce sugars. c. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce proteins. d. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that use sugars as reactants.
Which statement about the light reactions of photosynthesis and cellular respiration is correct? a. Both reactions occur in the cell cytoplasm b. plants do not require mitochondria because they produce ATP via photosynthesis c. ATP is produced as a result of the actions of an electron transport chain in both processes d. Light reactions and cellular respiration produce the same waste products e. the final electron acceptor in the light reactions is oxygen
Compare photophosphorylation and oxidative phosphorylation. How is chemiosmosis in chloroplasts different from chemiosmosis in mitochondria? a. Chemiosmosis is used in chloroplasts to transfer chemical energy from organic molecules to ATP. b. In mitochondria, light is transformed into ATP using photosystems I and II. c. Chemiosmosis in mitochondria occurs across an intra-organelle membrane, where it does not in chloroplasts. d. In chloroplasts, the high-energy electrons come from water.
In which process is ATP produced in both photosynthesis and cellular respiration by ATP synthase, respectively? a. Krebs Cycle and Light-dependent reaction b. Light-dependent reaction and oxidative phosphorylation c. Glycolysis and Light-independent reaction d. Light-independent reaction and oxidative phosphorylation
When oxygen gas is released as a result of photosynthesis, it is a direct byproduct of what process? a. splitting of water molecules b. the electron transfer system in the photosystems c. chemiosmosis d. reducing of NADP+
In the light-dependent reactions, what accumulates in the thylakoid compartment of chloroplasts? a. sugars c. O2 b. hydrogen ions d. CO2
In which compartment of the chloroplast and mitochondrion does the ATP synthase pump the protons respectively? a. Stroma and matrix b. Lumen and thylakoid membrane c. Lumen and intermembrane space d. Matrix and thylakoid lumen
The diagram below shows the relationship between photosynthesis and cellular respiration and the organelles in which they occur. 3. Photosynthesis and Cellular Respiration Sunlight Energy Carbon Dioxide Glucose + Water Oxygen ATP Which statement describes how photosynthesis and cellular respiration are interrelated? A. Oxygen is produced during cellular respiration and stored during photosynthesis. Carbon dioxide and water released by photosynthesis are used in cellular respiration. C. В. Photosynthesis absorbs energy as part of the process, but energy is released during the process of cellular respiration. D. Glucose is used during photosynthesis to produce food that is broken down during cellular respiration.
What happens when light hits the pigments, P680 and P700. during the light-dependent reactions? A. Excited electrons are passed to electron acceptors B. Glucose is produced C. Carbon fixation occurs D. Electrons are fused to form ATP
In which parts of the Calvin cycle are high energy phosphate groups donated by ATP to boost the energy of reactions? A. formation of G3P and regeneration of RuBP B. regeneration of RuBP and synthesis of PGA C. synthesis of PGA and oxidation of NADPH D. oxidation of NADPH and formation of G3P
The different parts of the chloroplast have separate reactions that occur in them. Which occurs in the stroma? A. Photolysis B. Light-dependent reaction C. Electron transport chain D. Calvin cycle